I rinse my spoon in water but i don't do anything else.
here's the full protocol if you're interested! I highly recommend doing it sometime, just get a few different coffees, ideally with a roast date < 4 weeks old. "best by" dates can be like 6 months post roast.
the rating system is for professionals, but doing each tasting focusing on specifics like acidity, bitterness, body, etc is definitely valuable!
https://sca.coffee/research/protocols-best-practices
or if you prefer a video, James Hoffmann has a cupping walkthrough.